RANKED: The best smartphones in the world

The new HTC One M9. Business Insider It's a big month for Android lovers.

The two newest flagship Android phones, the Samsung Galaxy S6 and HTC One M9 go on sale April 10. If you're in the market for a new phone, this is a good month to buy.

We update this list approximately once a month. Our rankings are based on a variety of factors including design, software and hardware features, content selection, carrier availability, and price. We only consider phones that are available in the U.S. at the time of publication. We list approximate prices for what phones cost without a contract. Prices vary from carrier to carrier and retailer to retailer. You can see March's smartphone rankings here.

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#15 BlackBerry Classic

BlackBerry

BlackBerry has gone back to the basics.

Its latest phone, the Classic, looks a lot like the BlackBerry Bold from a few years ago. It has a physical keyboard, trackpad, and larger screen. If you want a phone with a keyboard, the Classic is the best phone to buy.

Price: $449 unlocked from BlackBerry

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#14 Nokia Lumia 830

Business Insider

The Nokia Lumia 830 is one of the newest phones from Microsoft. It runs the Windows Phone 8 operating system and has a sharp 5-inch screen.

Price: About $420 on AT&T

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#13 HTC One M8 For Windows

Steve Kovach/Business Insider

The HTC One M8 For Windows is the best phone you can buy running the Windows Phone operating system. It has a gorgeous metal body and the new version of Windows Phone, 8.1, which includes the excellent digital assistant Cortana.

#12 Samsung Galaxy Note Edge

Business Insider/Lisa Eadicicco

The Note Edge is similar to the Galaxy Note 4, but it has a secondary screen on the side that changes depending on what app you're using. The "edge" screen can also display information like news updates and other notifications when the rest of the screen is switched off.

#11 iPhone 5S

William Wei, Business Insider

Apple's iPhone 5S may be well over a year old, but it's still a really good phone, especially if you don't want a bigger screen. If you want a great iPhone experience at a discount, get the iPhone 5S. However, if you want the best experience, you're better off spending the extra $100 on an iPhone 6.

#10 LG G3

Lisa Eadicicco/ Business Insider

LG's current flagship, the G3, has one of the sharpest displays ever put on a smartphone. It's also massive thanks to its 5.5-inch display. That makes the G3 more like a phablet than a standard smartphone.

It's a good Android phone, but LG put the power and volume keys on the back of the device, which is pretty awkward.

Warning: LG will likely announce its next phone, the G4, later in April.

#8 OnePlus One

Steve Kovach/Business Insider

What if you could get a smartphone with a huge 5.5-inch screen, great software, and zippy internal specs that rival the best smartphones?

That's what Chinese startup OnePlus did with its flagship phone, the One. The OnePlus One only costs $300 unlocked, which is much cheaper than other premium phones like the iPhone 6 and Samsung Galaxy S5, which can cost $650 or more.

#7 Moto X

Business Insider/ Lisa Eadicicco

Motorola's new Moto X, which launched in September, is a strong contender for best Android phone. Similar to Google's Nexus 6, the Moto X runs a nearly clean version of Android, meaning you get software updates a lot faster. The phone also looks really nice and has a 5.2-inch display.

#6 HTC One M9

Business Insider

HTC's newest flagship phone, the One M9, is a minor iteration over last year's model. It has a better camera, slightly tweaked design, and faster processor. But other than that, it's pretty much the same phone HTC made before.

*The HTC One M9 is available for preorder now. It goes on sale April 10.

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#5 Samsung Galaxy Note 4

Business Insider

Samsung's new Galaxy Note 4 is the best Android phablet you can buy.

It has an incredibly crisp 5.7-inch screen, the best display ever used on a smartphone. It also has a metal frame around the edges, which makes the phone feel a lot sturdier than previous versions. If you want a phablet-sized phone, the Galaxy Note 4 is one of the top devices you should consider.

*The Samsung Galaxy S6 is available for preorder now. It goes on sale April 10.

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#2 iPhone 6

Steven Tweedie

If you don't want a big-screen phablet, the iPhone 6 is the best phone you can buy. Unless you really like using Android or Windows Phones, the iPhone 6 should be your first choice.

Why? It's the perfect mix of design, hardware specs, and app selection. Apple also finally caught up to its competitors by adding a larger screen to the iPhone 6. It's 4.7 inches, up from the 4-inch screen on the iPhone 5S.

#1 iPhone 6 Plus

Business Insider

The iPhone 6 Plus is the best phone for most people. Yes, the 5.5-inch screen is huge and may feel cumbersome to some, but you get the added bonus of incredible battery life. It's also a lot thinner and easier to manage compared to other phablets.

If you're trying to decide between the iPhone 6 and the iPhone 6 Plus, go with the Plus.